fix: resolve CI lint and test failures

app/local-ai-commit-reviewer/tests/unit/test_llm.py

@@ -0,0 +1,52 @@
+from src.llm.provider import LLMProvider, LLMResponse, ModelInfo
+
+
+class MockLLMProvider(LLMProvider):
+    def __init__(self, available: bool = True):
+        self._available = available
+        self._models = []
+
+    def is_available(self) -> bool:
+        return self._available
+
+    def generate(self, _prompt: str, **_kwargs) -> LLMResponse:
+        return LLMResponse(
+            text="Mock review response",
+            model="mock-model",
+            tokens_used=100,
+            finish_reason="stop"
+        )
+
+    async def agenerate(self, _prompt: str, **_kwargs) -> LLMResponse:
+        return self.generate(_prompt, **_kwargs)
+
+    def stream_generate(self, _prompt: str, **_kwargs):
+        yield "Mock"
+
+    def list_models(self) -> list[ModelInfo]:
+        return self._models
+
+    def health_check(self) -> bool:
+        return self._available
+
+
+class TestLLMProvider:
+    def test_mock_provider_is_available(self):
+        provider = MockLLMProvider(available=True)
+        assert provider.is_available() is True
+
+    def test_mock_provider_not_available(self):
+        provider = MockLLMProvider(available=False)
+        assert provider.is_available() is False
+
+    def test_mock_generate(self):
+        provider = MockLLMProvider()
+        response = provider.generate("test prompt")
+        assert isinstance(response, LLMResponse)
+        assert response.text == "Mock review response"
+        assert response.model == "mock-model"
+
+    def test_mock_list_models(self):
+        provider = MockLLMProvider()
+        models = provider.list_models()
+        assert isinstance(models, list)